96 lines
4 KiB
Org Mode
96 lines
4 KiB
Org Mode
#+TITLE: Syntax Checking layer
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#+TAGS: checker|layer
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[[file:img/flycheck.png]]
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* Table of Contents :TOC_5_gh:noexport:
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- [[#description][Description]]
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- [[#features][Features:]]
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- [[#install][Install]]
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- [[#layer][Layer]]
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- [[#enablingdisabling-tooltips][Enabling/Disabling tooltips]]
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- [[#disabling-by-default][Disabling by default]]
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- [[#enable-flycheck-globally][Enable flycheck globally]]
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- [[#bitmaps][Bitmaps]]
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- [[#key-bindings][Key bindings]]
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* Description
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This layer adds on the fly syntax checking to all supported language layers.
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** Features:
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- Support for automatic syntax checking with [[http://www.flycheck.org/][Flycheck]] for various language layers
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- Tooltip syntax errors with =popwin=
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* Install
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** Layer
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To use this configuration layer, add it to your =~/.spacemacs=. You will need to
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add =syntax-checking= to the existing =dotspacemacs-configuration-layers= list in this
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file.
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As this is a support layer you will also have to install at least one supported language
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layer for it to have any effect.
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** Enabling/Disabling tooltips
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By default tooltips are enabled and used whenever it is possible.
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You can disable them by setting the variable =syntax-checking-enable-tooltips=
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to =nil=:
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers
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'((syntax-checking :variables syntax-checking-enable-tooltips nil)))
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#+END_SRC
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** Disabling by default
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By default, syntax-checking is enabled in all available major modes (except for
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=emacs-lisp-mode=) and may be toggled off with ~SPC t s~. You can default this to off
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by setting the variable =syntax-checking-enable-by-default= to =nil=:
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers
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'((syntax-checking :variables syntax-checking-enable-by-default nil)))
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#+END_SRC
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If you want more fine-grained control, you can configure the variable
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=flycheck-global-modes= instead. Note that this variable should be manipulated
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in =dotspacemacs/user-config=.
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** Enable flycheck globally
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Normally Spacemacs goes a long mile to enable syntax checking only where it
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makes sense. If syntax checking support is missing it is normally only a
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matter of declaring it in the layer. The best approach in this case is
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to open an issue and ask for syntax checking support.
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Some guides on the web suggest to enable flycheck globally by setting
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=(global-flycheck-mode)= in your =dotspacemacs/user-config=.
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This is neither necessary nor is it good for the layer system.
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In the contrary by doing so the layer system cannot longer decide for
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which modes activating flycheck would bring any useful outcome.
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This may result in loading slow or not properly configured checkers
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as well as break some of the more advanced configuration settings
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of the layer system.
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** Bitmaps
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If the original flycheck fringe bitmaps are more to your liking, you can set the
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variable =syntax-checking-use-original-bitmaps= to =t=:
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers
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'((syntax-checking :variables syntax-checking-use-original-bitmaps t)))
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#+END_SRC
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* Key bindings
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| Key binding | Description |
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|-------------+--------------------------------------------------------------|
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| ~SPC e b~ | check for errors now |
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| ~SPC e c~ | clear errors |
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| ~SPC e h~ | describe flycheck checker |
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| ~SPC e l~ | display a list of all the errors |
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| ~SPC e L~ | display a list of all the errors and focus the errors buffer |
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| ~SPC e s~ | set flycheck checker |
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| ~SPC e S~ | set flycheck checker executable |
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| ~SPC e v~ | verify flycheck setup |
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| ~SPC t s~ | toggle flycheck |
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| ~SPC e x~ | explain the error at point |
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